Frost dates for Vienna, VA
At Vienna, the median last spring frost (32°F) is Apr 14 and the median first fall frost is Oct 29, for a typical growing season of 198 days. For a 90% chance that the last frost has passed, wait until Apr 28. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 14Last spring frost (median)50% chance of 32°F after this date
- Apr 28Safer planting date10% chance of 32°F after this date
- Oct 29First fall frost (median)50% chance of 32°F by this date
- 198 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 11 | Apr 25 | May 10 |
| 32°F | Mar 30 | Apr 14 | Apr 28 |
| 28°F | Mar 18 | Apr 2 | Apr 16 |
| 24°F | Mar 4 | Mar 22 | Apr 5 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 7 | Oct 19 | Nov 1 |
| 32°F | Oct 17 | Oct 29 | Nov 11 |
| 28°F | Oct 26 | Nov 8 | Nov 23 |
| 24°F | Nov 5 | Nov 20 | Dec 9 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 158 days | 178 days | 196 days |
| 32°F | 180 days | 198 days | 218 days |
| 28°F | 203 days | 221 days | 243 days |
| 24°F | 225 days | 246 days | 270 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 22181 | 7b | 5 to 10°F | 1 km |
| 22180 | 7b | 5 to 10°F | 3 km |
| 22124 | 7b | 5 to 10°F | 4 km |
| 22031 | 7b | 5 to 10°F | 4 km |
| 22182 | 7b | 5 to 10°F | 5 km |
| 22027 | 7b | 5 to 10°F | 6 km |
| 20191 | 7b | 5 to 10°F | 7 km |
| 22035 | 7b | 5 to 10°F | 8 km |
| 22030 | 7b | 5 to 10°F | 8 km |
| 22043 | 7b | 5 to 10°F | 8 km |
| 22032 | 7b | 5 to 10°F | 8 km |
| 22102 | 7b | 5 to 10°F | 8 km |
| 22033 | 7b | 5 to 10°F | 8 km |
| 20190 | 7b | 5 to 10°F | 9 km |
| 22042 | 7b | 5 to 10°F | 9 km |
| 22003 | 7b | 5 to 10°F | 9 km |
| 20194 | 7b | 5 to 10°F | 11 km |
| 22015 | 7b | 5 to 10°F | 12 km |
| 22151 | 7b | 5 to 10°F | 12 km |
| 22066 | 7b | 5 to 10°F | 13 km |
| 22152 | 7b | 5 to 10°F | 14 km |
| 22153 | 7b | 5 to 10°F | 17 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00448737, at 38.8922, -77.2892, elevation 127 m (418 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 99.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Washington DC Dulles Airport (16 km)
- WFO Sterling (19 km)
- Washington Reagan Airport (23 km)
- Manassas (25 km)
- Quantico MCAS (44 km)
- Purcellville (46 km)
- Warrenton 3 SE (48 km)
- Mount Wx (55 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.